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化学 高校生

全問お願いします🙏🏻

4. (1) 過酸化水素水の濃度を滴定によって求めたい。 濃度が未知の過酸化水素水 A をコニカル ビーカーに 10.0mL 入れ, 硫酸を加えて酸性にした。 この水溶液に 2.00×10-2mol/L の過マ ンガン酸カリウム水溶液をビュレットを用いて滴下したところ, 終点までに 12.0mL の過マ ンガン酸カリウム水溶液を要した。 H=1.00, O=16.0 ① 滴定の終点を決定する方法を40字程度で記せ。 ② 下線部で,硫酸の代わりに塩酸あるいは硝酸を用いることはできない。 その理由を書け。 ③ 硫酸酸性水溶液中における過酸化水素と過マンガン酸カリウムとの反応の化学反応式を 記せ。 ④ 過酸化水素水Aの濃度は何mol/Lか。 有効数字3桁で求め, 数値を記せ。 ⑤ 過酸化水素水 A は何g/Lか。 有効数字3桁で求め, 数値を記せ。 [18 甲南大改〕 (2) 濃度 2.20mol/Lの過酸化水素水 5.00mL を希硫酸の添加により酸性にして, 濃度 8.00×10-2mol/Lの過マンガン酸カリウム水溶液を加える反応において, 過酸化水素が すべて消費されるために必要な過マンガン酸カリウム水溶液の体積 (mL) を有効数字2桁で求 めよ。 (3) 硫酸酸性水溶液中における過酸化水素とヨウ化カリウムとの反応の化学反応式を示せ。 〔18 九州大〕

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英語 高校生

間違えてるところあったら教えてください💦

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英語 高校生

グラマーコレクションの「名詞の語法」の答えを教えて欲しいです🙇🏻

154 (Practice).... ① 英文中の空所に入る適切な語または語句を選択肢から選びなさい。 1. Can you give me ( Ogive A a big □ give A ringicall] 「Aに電話をかける」. □ keep A company 「Aと一緒にいる/Aに同行する」, □ have no idea 「わからない」 to the effect that SV 「・・・という趣旨の」 Ⓒ a good advice some good advices □ 3. ( □ 2. ( ) at the antique shop is really expensive. O The furniture 2 Furnitures ) the news on the Internet is said to be biased. O Much of 2 Many of 3 Lot of 4. Could you please make ( fun 2 seats 5. We changed ( trains 6. I'd like to ( be friend ) on what to buy here? 10. I have ( 7. We are on friendly ( ℗ terms a promise 3 an order 2 some good advice good an advice 3 A furniture ) for others? 8. Do they really have ( O meaningful to 2 to mean at 2 goals ) with someone who is good at English. 9. The daughter of your uncle is your ( 1 sister 2 brother 3 help ) at Yokohama Station to go to Kamakura. 2 train 3 a train ) with all our neighbors. 3 meeting make a friend 3 make friendly make friends ) buy such a huge mansion? 3 the means to 4 Some furnitures ). 3 cousin ) with the dentist this afternoon. 4 Few of 4 room 4 another train circle 4 by means of 2 an appointment 4 a reservation 4 aunt 158 (昭和大) 15 <国士舘大 <法 <岐阜聖徳学 ( <九州 (L

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